Stone Boxes are a type of block in both Paper Mario and Paper Mario: The Thousand-Year Door. In Paper Mario, they can only be broken with the Super Hammer or the Ultra Hammer, but in Paper Mario: The Thousand-Year Door they can be broken only with the Ultra Hammer, making them unbreakable until after Chapter Six. They are unbreakable with any other hammer.
Stone Giga-Boxes are large Stone Boxes found in Paper Mario: The Thousand-Year Door. They can only be broken by using a spin hammer attack with the Ultra Hammer.